Coil for electromagnets.



C. ALBORG.

GOL FOR ELEGTROEAGNETS.

APPLGATIoN FILED JUNE 4, 1906.

ATTORNEY nuire scarse CHRISTIAN. AALBORG, (2F WILKINSBURG,

HOUSE ELECTRXC & MANUFACTURING COMPANY, A CORPORATION OFA PENNSYL-VANIA.,

PATENT PENNSYLVANIA; ASSIGNOB, TO wWESTING- COXL FOR ELECTROMAGNETS.

Application filed .Tune 4,

To ull whom it may concern:

Be it known that .L CHRISTIAN a citizen ot the lfnited States. and aresident of Vi'illtinsburg, in the county ot Allegheuy and State ofPennsylvania, have invented a new and uset'ul improvement in (oilsforla'lect'romagncts` of which the fol lowingl is a specitieation.

My invention relates to magnetizing coils for electro-magnets and hasspecial reference to such coils as are adapted for use with automaticcircuit interrupters.

The object of my invention is to provide a simple and durable coil ofthe class above indicated which shall be adapted t'or use with atwo-part or Ushaped core member, and the construction of which shallinvolve a minimum expenditure ot' labor and niaterial.

Circuit-breakers or siinila r devices intended t'or automaticallyinterruptingelectric circuits traversed by relatively large currentvalues, have usually been provided with magnet coils which wererelatively e.\'- pensive and ditlicult to construct and which compriseda number of convolutions formed of large sized rods ot conducting'material bent into the desired shape.

.According to my present; invention` l provide a multi-path coil whichmay be readily constructed and which adapted tor use with a i-shapedmagnetizable core.

Figure l ot the accompanying drawing is a side elevation of a circuitinterruptcr embodying the magnet coil otl in v invention. the coilbeing,- further disclosed in de ail in 2 and 3.

lrterring to the drawings. a circuit interrupter lV is mounted upon aninsulating slab 2 and comprises a stationary contact member 3, anoverload release magnet l. a movable bridging contact;member o and anoperating handle tl. The tripping magnet. 4 comprises a coil i' havingay contacty projection 8 which is adapted to bc engaged by the movablebridging contact member when the circuit iuterriniter is closed. l deemit unnecessary to t'urthcr describe the arrangeA nient ot' parts or theaction ot the circuit iuterrupter since' they are well ltuown. and thecoil mayber used with any suitable Vtorni oi iutcrrupter or tor otherpurposes.

The coil i shown assubsiantially re.c tangular in cross-section and asproviled Specification of Letters Patent.

AALnone,

Patented Oct. 25, 19H9. 1.9{36` Serial No. 320,149.

l with a series of cross webs 9 which connect i opposite sides and leavetwo similar recesses niaguetizable core ll are drawn when suliicientcurrent traverses the coil. lu the center of one side -and above thepoint or" connection with the cross webs 5l. is located the projection Swhich extends in a line parallel to the axes ot' the coil. Vv'heu thecircuit interrupter is closed` current is supplied from the stationary'contact meanber 2% through the bridgingr contact member 5 to theprojection S and the circuit is continued from this point, ashereinbefore explained. through the coil T to a tern'iinal projection12. This projection is a continuation oli the cross web 9. which isfarthest removed from the projection 8.

ln order to cause the current flowing' into the circuit to encircle andenergize the magA l netizable core members. the casting may betransformed into a series ot' convolutions .by making lateral saw-cuts13 between the webs 9 and diagonal saw-outs i4 across the ends which'c'onnect the ends of the lateral sawcut above a given web en one side,with the y ends of a similar out on the opposite side I below the sameweb. I In coils which are adapted for use with l very largecircuit-breakers,- it may be of advantage to core the slots or form themin feasting 'the coil instead of machining or I saw-cutting thc-rn.

When the completed coil is in use, the l electric current enters theprojection S divides, passes through the upper portion on either side,returns through the upper web in a common path, again divides and lpasses through the side section of the coil, I and so on until itfinally 'passes through the terminal projection l2 from the lowest web.l A coil of this kind is well adapted For use l with relatively largevalues oit' electric curl rent. since there is no danger ot the adiajcent eonvolutions beconnng overheated and l l l t l l l l l l l ldisplaced or moved into engagementr with each other.

lt is"y ot course, not essential that the slotted tubular shell. whichconstitutes the major portion ot the coil, should have thecross-sectional forni shown in the drawing. and, as regards this andother structural y lfeatures. it is to be understood that the detscriptive terms employed in the foregoing l it) into which the two legsof a UeshapedA specification and in the appended claimsare not to beconstrued as imposing limitations which are not demanded by the priorart.

claim as my invention:

l. A magnet coil comprising a tubular shell and a plurality ot websextending through the shell from side to side, said shell having sideslot-s between the ends of adjacent webs and diagonal slots joiningr theends of each side slot with the ends of the next slot in the series atthe opposite sident the shell.

2. A multi-path mag-net coil comprising a tubular shell of approximatelyrectangular cross-section and a plurality of webs extending through theshell from side to side, said shell having side slots between the endsof adjacent webs and diagonal slots between the ends of each side slotand a longitudinally offset slot at the opposite side of the shell toform paths ot connection between one endof each web and the opposite endof the next adjacent web.

3. A magnet coil comprising a tubular member having: substantiallyparallel cross webs through the center, lateral slots across the sidesconnected by the web and diagonal slots across the ends adjacent to theconnected sides.

4. A mag-net coil comprising' a tubular member having substantiallyparallel cross webs through the center, lateral slots across the sidesconnected by the webs and diagonal slots at both ends which form twopaths of connection between one end of each web and the opposite end ofthe next adjacent web.

5. A magnet coil comprising a tubular shell and a plurality ofsubstantially parallel cross. webs extending through the shell from sideto side, said shell having side slots between the ends ot' adjacentwebs, diagonal slots in the sides adjacent to those connected by thewebs and projections by which the coil is supported and electricallyconnected in circuit. l

G. A multi-path magnet coil comprising a tubular shell and parallelcross-webs connecting its opposite sides, said shell having side slotsbetween the ends of adjacent webs, diagonal slots joining the ends ofthe side slots to form paths of connection between one end of each weband the opposite'end ot the next adjacent web, an integral contactprojection at one end, and an integralk terminal projection at theopposite end.

7. A magnet coil of substantially rectangular contour having a pluralityof internal cross pieces, slots between the ends of adjacent crosspieces and diagonal slots that connect thc ends of the first-named slotsat one side with the ends of corresponding slots in different planes at.the other side.

n testimony whereof, l have hereunto subscribed my name this 24th day ofMay, 1906.

@HB1 STN ALBORG.

